Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 424
NWS Storm Prediction Center Norman OK
215 PM CDT Sun Jun 16 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Far Eastern Iowa
Northern Illinois
Far Northwest Indiana
Southern Wisconsin
Lake Michigan
* Effective this Sunday afternoon and evening from 215 PM until
800 PM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph likely
Isolated large hail events to 1.5 inches in diameter possible
A tornado or two possible
SUMMARY...A small bowing cluster of thunderstorms should continue to
increase in size and intensity this afternoon as it spreads
east-northeastward across northern Illinois and southern Wisconsin.
Severe/damaging winds around 60-70 mph should be the main threat,
but isolated hail up to 1-1.5 inches in diameter and a brief tornado
also appear possible.
The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 65 miles west southwest
of Rockford IL to 50 miles north of Valparaiso IN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
25035.
...Gleason
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 424
NWS Storm Prediction Center Norman OK
215 PM CDT Sun Jun 16 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Far Eastern Iowa
Northern Illinois
Far Northwest Indiana
Southern Wisconsin
Lake Michigan
* Effective this Sunday afternoon and evening from 215 PM until
800 PM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph likely
Isolated large hail events to 1.5 inches in diameter possible
A tornado or two possible
SUMMARY...A small bowing cluster of thunderstorms should continue to
increase in size and intensity this afternoon as it spreads
east-northeastward across northern Illinois and southern Wisconsin.
Severe/damaging winds around 60-70 mph should be the main threat,
but isolated hail up to 1-1.5 inches in diameter and a brief tornado
also appear possible.
The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 65 miles west southwest
of Rockford IL to 50 miles north of Valparaiso IN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
25035.
...Gleason
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 424 SEVERE TSTM IA IL IN WI LM 161915Z - 170100Z
AXIS..65 STATUTE MILES NORTH AND SOUTH OF LINE..
65WSW RFD/ROCKFORD IL/ - 50N VPZ/VALPARAISO IN/
..AVIATION COORDS.. 55NM N/S /39SSE DBQ - 39NW GIJ/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 25035.
LAT...LON 42779027 43118700 41238700 40899027
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 424 Status Report Messages:
STATUS REPORT #4 ON WW 424
VALID 162320Z - 170040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 NNW DNV
TO 35 WNW VPZ TO 40 W MKG.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION
..THORNTON..06/16/24
ATTN...WFO...DVN...LOT...ILX...MKX...
&&
STATUS REPORT FOR WS 424
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC089-127-170040-
IN
. INDIANA COUNTIES INCLUDED ARE
LAKE PORTER
$$
LMZ743-744-745-777-779-170040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 424
VALID 162240Z - 162340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 N BMI TO
45 NE MMO TO 35 WNW MKE.
..THORNTON..06/16/24
ATTN...WFO...DVN...LOT...ILX...MKX...
&&
STATUS REPORT FOR WS 424
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC031-043-063-091-097-197-162340-
IL
. ILLINOIS COUNTIES INCLUDED ARE
COOK DUPAGE GRUNDY
KANKAKEE LAKE WILL
$$
INC089-127-162340-
IN
. INDIANA COUNTIES INCLUDED ARE
LAKE PORTER
$$
WIC059-079-101-133-162340-
WI
. WISCONSIN COUNTIES INCLUDED ARE
KENOSHA MILWAUKEE RACINE
WAUKESHA
$$
LMZ645-646-673-675-740-741-742-743-744-745-777-779-162340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP HARBOR IL
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5NM
OFFSHORE TO MID LAKE
WINTHROP HARBOR TO WILMETTE HARBOR IL
WILMETTE HARBOR TO NORTHERLY ISLAND IL
NORTHERLY ISLAND TO CALUMET HARBOR IL
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 424
VALID 162145Z - 162240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 NNE PIA
TO 30 S RFD TO 10 NE RFD TO 20 E MSN.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1291
..THORNTON..06/16/24
ATTN...WFO...DVN...LOT...ILX...MKX...
&&
STATUS REPORT FOR WS 424
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC007-031-037-043-063-089-091-093-097-099-111-123-155-197-
162240-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BOONE COOK DE KALB
DUPAGE GRUNDY KANE
KANKAKEE KENDALL LAKE
LA SALLE MCHENRY MARSHALL
PUTNAM WILL
$$
INC089-127-162240-
IN
. INDIANA COUNTIES INCLUDED ARE
LAKE PORTER
$$
WIC055-059-079-101-127-133-162240-
WI
. WISCONSIN COUNTIES INCLUDED ARE
JEFFERSON KENOSHA MILWAUKEE
RACINE WALWORTH WAUKESHA
$$
LMZ645-646-673-675-740-741-742-743-744-745-777-779-162240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP HARBOR IL
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5NM
OFFSHORE TO MID LAKE
WINTHROP HARBOR TO WILMETTE HARBOR IL
WILMETTE HARBOR TO NORTHERLY ISLAND IL
NORTHERLY ISLAND TO CALUMET HARBOR IL
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 424
VALID 162050Z - 162140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SSE MLI
TO 35 E MLI TO 25 WSW RFD TO 30 WNW RFD TO 30 SSE LNR.
..KERR..06/16/24
ATTN...WFO...DVN...LOT...ILX...MKX...
&&
STATUS REPORT FOR WS 424
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC007-011-031-037-043-063-089-091-093-097-099-103-111-123-141-
155-175-177-197-201-162140-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BOONE BUREAU COOK
DE KALB DUPAGE GRUNDY
KANE KANKAKEE KENDALL
LAKE LA SALLE LEE
MCHENRY MARSHALL OGLE
PUTNAM STARK STEPHENSON
WILL WINNEBAGO
$$
INC089-127-162140-
IN
. INDIANA COUNTIES INCLUDED ARE
LAKE PORTER
$$
WIC025-045-055-059-079-101-105-127-133-162140-
WI
. WISCONSIN COUNTIES INCLUDED ARE
DANE GREEN JEFFERSON
KENOSHA MILWAUKEE RACINE
ROCK WALWORTH WAUKESHA
$$
LMZ645-646-673-675-740-741-742-743-744-745-777-779-162140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP HARBOR IL
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5NM
OFFSHORE TO MID LAKE
WINTHROP HARBOR TO WILMETTE HARBOR IL
WILMETTE HARBOR TO NORTHERLY ISLAND IL
NORTHERLY ISLAND TO CALUMET HARBOR IL
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (20%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
High (70%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Low (20%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (10%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
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